"This is just the beginning of Heather's legacy. This is not the end of Heather's legacy. You need to find in your heart that small spark of accountability. What is there that I can do to make the world a better place?"

Bro spoke before a capacity crowd in the Paramount Theater in Charlottesville, Va., where the 32-year-old Heyer was run down and killed Saturday by a Dodge Challenger with a neo-Nazi at the wheel.

The service drew a multicultural crowd of roughly 1,600 mourners, and was defined by only one color: purple, the dead woman's favorite shade, worn in tribute by many in the audience.

Heather Heyer's mother, Susan Bro, speaks at her memorial service inside the Paramount Theater in Charlottesville on Wednesday. (JONATHAN ERNST/REUTERS)

Both her mom and her dad donned purple shirts before speaking about the still-shocking news that their daughter died while protesting against the Nazi sympathizers, skinheads and Ku Klux Klan members invading her town.

Bro, in her closing comments, urged the mourners to channel their anger and frustration into something positive.

"If you're not outraged, you're not paying attention," she warned the crowd, quoting from her daughter's oft-shared Facebook post. "And I want you to pay attention, find what's wrong ... and say to yourself, 'What can I do to make a difference?'

"And that's how you're going to make my child's death worthwhile," Bro continued. "I'd rather have my child. But by golly, if I have to give her up, we're going to make it count."

The crowd rose to its feet in cheers as Bro walked slowly back to her seat in the front row of the building. A photo of her daughter served as a backdrop on the large screen behind her.

Heather Heyer was killed on Aug. 12. (Miller Law Group)

Earlier, Heather's dad, Mark Heyer, fought back tears as he remembered his daughter.

"I came here today and I was overwhelmed at the rainbow of colors in this room," said the emotional father, choking up at times.

"That's how Heather was ... if she loved you, that was it. You were stuck. For that, I'm truly proud of my daughter."

The memorial program featured the initials "HH" inside a purple heart honoring "Heather Danielle Heyer 5/29/85-8/12/17."

In the days since her death last Saturday, Heyer recalled hearing stories about his beloved daughter.

James Fields, 20, charged with second-degree murder for running down Heyer, remained jailed Wednesday. The suspect was described as obsessed with Adolf Hitler and aligned politically with the neo-Nazi movement.

Video captured Fields throwing the car in reverse and slamming into more people as bodies went flying. Nineteen people were injured.

Including Fields, five people have been arrested in the weekend mayhem, which began Friday night at the University of Virginia with white nationalists carrying torches and chanting that "Jews will not replace us!"

Late Wednesday, the campus was bathed in a much different light as hundreds gathered for a candlelight vigil against hate.

Police are still looking for the men who savagely beat Deandre Harris, a 20-year-old black man from Charlottesville, in a parking garage Saturday night.